Dirty-Frag-CVE-2026-43284

Dirty Frag CVE-2026-43284 and CVE-2026-43500 Exploit Reproduction and Detection Lab for a Linux kernel local privilege escalation chain. Status: VERIFIED. I completed the reproduction, the fileless verification, and the syscall-level detection in the lab kernel 6.18.9+kali-amd64. This document is...

kernel: xfrm: fix stale skb->prev after async crypto steals a GSO segment

A flaw was found in the Linux kernel's xfrm subsystem. This vulnerability arises when asynchronous cryptographic operations incorrectly handle network packet segments, leaving a pointer to memory that has already been released. An attacker could potentially exploit this use-after-free condition t...

kernel: xfrm: input: hold netns during deferred transport reinjection

A flaw was found in the Linux kernel's xfrm input component. The transport-mode reinjection process, which handles network packet re-injection, stores a network namespace pointer that must remain valid until a deferred callback completes. However, a missing reference count for the network namespa...

kernel: xfrm: hold dev ref until after transport_finish NF_HOOK

A flaw was found in the Linux kernel's xfrm IP eXtensible FRamework subsystem. This vulnerability involves a race condition where a network device's reference is released too early during packet processing after asynchronous cryptography. This premature release can lead to the system attempting t...

dirtyfrag

Dirty Frag: Universal Linux LPE Abstract This document describes the Dirty Frag vulnerability class, first discovered and reported by Hyunwoo Kim @v4bel, which can obtain root privileges on major Linux distributions by chaining the xfrm-ESP Page-Cache Write CVE-2026-43284 vulnerability and the...

DirtyFrag-for-dummies

Dirty Frag / CVE-2026-43284 — Research Notes Overview This repository contains a cleaned-up technical diagram and supporting notes for the Linux kernel vulnerability commonly referred to as Dirty Frag and tracked for the xfrm-ESP path as CVE-2026-43284. The issue belongs to the broader Dirty Frag...

CVE-2026-43284

🚨 CVE-2026-43284 - Dirty Frag 🚨 Universal Linux Kernel Local Privilege Escalation 📋 Overview Dirty Frag also known as Copy Fail 2 is a high-impact local privilege escalation vulnerability in the Linux kernel. It allows an unprivileged local user to obtain root privileges on affected systems...

CVE-2026-43284-dirtyfrag-detection

DirtyFrag CVE-2026-43284 PoC Validation and auditd Detection Scope: Linux Local Privilege Escalation LPE validation focused on the XFRM/ESP path associated with CVE-2026-43284. This repository contains an English report and evidence artifacts from a controlled laboratory validation of the public...

DirtyClone

DirtyClone DirtyClone is a diagnostic, proof-of-concept local privilege escalation tool written in C. It targets a kernel/XFRM-related exploit path described in the source as CVE-2026-43503 and is intended only for authorized security research in controlled environments. Overview This repository...

CVE-2026-31431

CopyFail2 CVE-2026-31431 - Python Implementation Python port of the CopyFail2 kernel exploit leveraging xfrm ESP-in-UDP MSGSPLICEPAGES no-COW fast path for unprivileged Linux local privilege escalation. Replaces a nologin/false entry in /etc/passwd with a passwordless uid-0 user and drops into a...

yc-mk8s-copy-fail-mitigation

Copy Fail / Dirty Frag Mitigation for Yandex Managed Kubernetes Automatic application of mitigation for vulnerabilities CVE-2026-31431, CVE-2026-43284 and CVE-2026-43500 in the Linux kernel on all worker nodes of a Yandex Managed Kubernetes cluster. Vulnerability Description CVE ID: CVE-2026-4328...

Dirty-Frag-Kubernetes-PoC

Dirty Frag CVE-2026-43284 — Kubernetes Container Escape PoC A proof-of-concept demonstrating how a default, unprivileged Kubernetes Pod can achieve node-level code execution on Amazon EKS by exploiting the Dirty Frag Linux kernel page-cache corruption vulnerability through shared container image...

Dirty-Frag-Analysis

Dirty Frag Deep Technical Analysis CVE-2026-43284 xfrm-ESP / CVE-2026-43500 RxRPC Linux kernel local privilege escalation vulnerability — PoC reverse engineering · Shellcode breakdown · Patch principles · Detection script Vulnerability Overview Dirty Frag exploits two independent vulnerabilities,...

SG-2026-0024

Dirty Frag primitive-only PoC Readable N4C demonstrator for CVE-2026-43284 XFRM/ESP and CVE-2026-43500 RxRPC/RXKAD. The PoC answers one question: can an unprivileged process change the page cache of a root-owned, read-only file through a sharedskbuff fragment? It does not overwrite /usr/bin/su or...

CVE-2026-46300_Fragnesia

🧨 Fragnesia — CVE-2026-46300 Linux Kernel LPE Audit & Exploit Toolkit · Page-Cache / XFRM ESP-in-TCP espintcp Regression Interactive audit → LPE prerequisite detection → Automated exploit execution after confirmation ⚠️ Ethical & Legal Warning This tool is intended solely for legitimate and...

CVE-2026-43284

🚨 CVE-2026-43284 — Dirty Frag 🚨 Universal Linux Kernel Local Privilege Escalation Overview Field| Detail ---|--- CVE| CVE-2026-43284 xfrm/ESP + CVE-2026-43500 RxRPC Nickname| Dirty Frag CVSS| 7.8 HIGH Type| Local Privilege Escalation LPE Introduced| Linux kernel 4.10 2017, commit cac2661c53f3...

XCP_ng_CVE-2026-43284_tester

XCP-ng Dirty Frag Diagnostic — CVE-2026-43284 A community diagnostic tool to determine whether an XCP-ng dom0 host is exposed to CVE-2026-43284 "Dirty Frag", a local privilege escalation vulnerability in the Linux kernel's xfrm-ESP subsystem. TL;DR — All current XCP-ng releases 8.1, 8.2, 8.3...

DirtyFrag-go

dirtyfrag-go Two bugs. One shell. No disk writes. Go port of dirtyfrag CVE-2026-43284 / CVE-2026-43500. How it works tl;dr The bug class is in the Linux kernel XFRM subsystem. When a file page is spliced into a pipe and then into an ESP-encrypted socket, the kernel decrypts the ESP payload in-pla...

Fragnesia-go

fragnesia-go One SA. One byte at a time. No race. Go port of fragnesia CVE-2026-46300. Member of the Dirty Frag vulnerability class - separate bug, same surface, own patch. How it works tl;dr The bug is in the Linux XFRM ESP-in-TCP subsystem. When TCPULP espintcp is installed on a socket after da...

CVE-2025-39965

DISCLAIMER All content provided is for educational and research purposes only. All testing was conducted exclusively on an Linux Kernel Emulator, in a safe, isolated environment. No production systems or devices owned by others were involved or affected during this research. The author assumes no...